Siemens SENTRON 3VA1163-6EF36-0DH0 — 63 A MCCB with TM240 Release and Undervoltage Trip
Its TM240 thermal-magnetic release handles overloads and short circuits up to 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 17 kA at 690 V — so the same breaker covers LV switchboards from 240 V to 690 V without swapping frame sizes.
At 415 V the 3VA1163-6EF36-0DH0 interrupts 154 kA — that is full-rated breaking capacity (Icu) per IEC 60947-2, meaning it can clear a bolted fault at that level and still be serviceable afterward. For a 630 kVA transformer secondary at 415 V (typical fault current around 25–35 kA), this breaker gives roughly 4× headroom, which simplifies selective coordination downstream: you can size branch MCCBs at 25–36 kA and rely on the 3VA1163 to let through only the energy the branch can handle.
The breaker measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a 3-pole MCCB that fits standard 25 mm DIN-rail spacing or four-screw flush-mount plates. Front IP40 protection means it is suited for indoor panel installation where no water spray or dust ingress is expected. The TM240 release is factory-set and non-adjustable for thermal pickup; if your load profile requires field-adjustable long-time delay, step up to the electronic-release variants in the same 3VA frame.